domain-modeling

Centralize domain model parsing by applying the parse-once pattern to convert raw data into typed objects at the boundary, exposing type-safe APIs for reuse across multiple services without duplicating validation logic.

Implement a Repository pattern by fetching raw YAML data and constructing domain models at the boundary using factory methods like from_yaml_string, ensuring parsing happens once and yields strongly typed objects.

Create type-safe domain models from raw JSON or Markdown by using factory methods to validate data and construct strongly typed objects, enforcing boundary validation and clear separation of concerns through a dedicated domain layer.

You need the parse-once pattern when domain modeling leads to scattered parsing logic, weak type-safety, and duplicated validation, allowing you to convert raw data into well-formed models and expose typed accessors.

Yes, this domain modeling approach supports independent testability by creating rich domain models that parse data once, allowing configuration objects to be tested independently and reused across multiple services.

Separate parsing logic from business logic by using a Repository to fetch raw data and factory methods to construct domain models at the boundary, centralizing validation in a dedicated domain layer with type-safe accessors.